Arcellx, Inc. ACLX
CIK 0001786205 · CUSIP 03940C100
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | FMR LLC CIK 315066 · View history | $358.04M 6,487,334 shares | 0.02% | +1.09M(+20.30%)Added | SEC filing ↗ Aug 13, 2024 | ▾ |
| 02 | PERCEPTIVE ADVISORS LLC CIK 1224962 · Amended · View history | $214.67M 3,889,739 shares | 5.18% | -43.82K(-1.10%)Reduced | SEC filing ↗ Aug 16, 2024 | ▾ |
| 03 | Paradigm Biocapital Advisors LP CIK 1855655 · View history | $212.38M 3,848,095 shares | 8.13% | +30.00K(+0.80%)Added | SEC filing ↗ Aug 14, 2024 | ▾ |
| 04 | NEA Management Company, LLC CIK 1512848 · View history | $206.70M 3,745,262 shares | 15.55% | 0(0.00%)Unchanged | SEC filing ↗ Aug 14, 2024 | ▾ |
| 05 | BlackRock Inc. CIK 1364742 · View history | $194.07M 3,516,364 shares | 0.00% | +450.30K(+14.70%)Added | SEC filing ↗ Aug 13, 2024 | ▾ |
| 06 | SR One Capital Management, LP CIK 1910264 · View history | $129.51M 2,346,630 shares | 40.55% | 0(0.00%)Unchanged | SEC filing ↗ Aug 13, 2024 | ▾ |
| 07 | VANGUARD GROUP INC CIK 102909 · View history | $126.73M 2,296,195 shares | 0.00% | +67.34K(+3.00%)Added | SEC filing ↗ Aug 13, 2024 | ▾ |
| 08 | JANUS HENDERSON GROUP PLC CIK 1274173 · View history | $104.98M 1,902,618 shares | 0.06% | +380.31K(+25.00%)Added | SEC filing ↗ Aug 14, 2024 | ▾ |
| 09 | STATE STREET CORP CIK 93751 · View history | $96.90M 1,755,664 shares | 0.00% | -129.45K(-6.90%)Reduced | SEC filing ↗ Aug 14, 2024 | ▾ |
| 10 | PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history | $90.00M 1,630,690 shares | 0.01% | +286.14K(+21.30%)Added | SEC filing ↗ Aug 14, 2024 | ▾ |
| 11 | RA CAPITAL MANAGEMENT, L.P. CIK 1346824 · View history | $88.53M 1,604,014 shares | 1.17% | +1.60MNew | SEC filing ↗ Aug 14, 2024 | ▾ |
| 12 | Cormorant Asset Management, LP CIK 1583977 · View history | $84.16M 1,525,000 shares | 4.90% | -255.00K(-14.30%)Reduced | SEC filing ↗ Aug 14, 2024 | ▾ |
| 13 | SUVRETTA CAPITAL MANAGEMENT, LLC CIK 1569064 · View history | $83.68M 1,516,254 shares | 3.42% | -46.10K(-3.00%)Reduced | SEC filing ↗ Aug 14, 2024 | ▾ |
| 14 | T. Rowe Price Investment Management, Inc. CIK 1897612 · View history | $64.78M 1,173,791 shares | 0.04% | +190.93K(+19.40%)Added | SEC filing ↗ Aug 14, 2024 | ▾ |
| 15 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $51.62M 935,186 shares | 0.00% | +96.72K(+11.50%)Added | SEC filing ↗ Aug 9, 2024 | ▾ |
| 16 | LORD, ABBETT & CO. LLC CIK 728100 · Amended · View history | $48.23M 873,844 shares | 0.16% | -324.27K(-27.10%)Reduced | SEC filing ↗ Oct 7, 2024 | ▾ |
| 17 | Vestal Point Capital, LP CIK 1974915 · View history | $37.25M 675,000 shares | 2.78% | +575.00K(+575.00%)Added | SEC filing ↗ Aug 14, 2024 | ▾ |
| 18 | MORGAN STANLEY CIK 895421 · Amended · View history | $30.08M 545,077 shares | 0.00% | -151.69K(-21.80%)Reduced | SEC filing ↗ May 14, 2025 | ▾ |
| 19 | GREAT POINT PARTNERS LLC CIK 1281446 · View history | $27.15M 492,000 shares | 5.20% | +192.00K(+64.00%)Added | SEC filing ↗ Aug 14, 2024 | ▾ |
| 20 | Affinity Asset Advisors, LLC CIK 1773195 · View history | $25.39M 460,000 shares | 4.00% | +160.00K(+53.30%)Added | SEC filing ↗ Aug 14, 2024 | ▾ |
Showing 20 / 168 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 168 reporting institutions.
This page includes 20 of 168 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
＋ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 168 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.
MCP https://api.akkrudata.ai/mcp
akkru_institutional_holdings
{"action":"holders","cusip":"03940C100","quarter":"2024Q2","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP / CLI documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.